a-a a-b aaa aab aak aam aar aau ab- aba abb abk abm abr abu aka akb akk akm akr aku ama amb amk amm amr amu ar- ara arb ark arm arr aru au- aua aub auk aum aur b-u baa bab bak bam bar bau bba bbb bbk bbm bbr bbu bka bkb bkk bkm bkr bma bmb bmk bmm bmr bmu bra brb brk brm brr bru bua bub buk bum bur buu ka- kaa kab kak kam kar kau kba kbb kbk kbm kbr kbu kkb kkk kkm kkr kku kma kmb kmk kmm kmu kra krk krr kru kub kuk kum kur kuu m-r maa mab mak mam mar mau mba mbb mbk mbm mbr mbu mka mkb mkk mkm mkr mku mma mmb mmk mmm mmr mmu mra mrb mrk mrm mrr mru mua mub muk mum mur muu ra- raa rab rak ram rar rau rba rbb rbk rbm rbr rbu rkb rkk rkm rku rma rmb rmm rmr rra rrb rrk rrm rrr rru rua rub ruk rum rur ruu ua- uaa uab uak uam uar uau uba ubb ubk ubr ubu uka ukb ukk ukr uku um- uma umb umm umr umu ur- ura urb urk urm urr uru uua uum uur uuu